A professional who operates machine, alone or as member of crew, to coat, impregnate, imprint, or form rubber sheeting or rubberized fabric. Respnsibilities include:

• Turns steam valves to regulate heat or rolls, judging heat by action of rubber and by feeling rolls with hand.
• Turns handwheels or capstan bar to adjust distance between rolls.
• Verifies thickness of calendered material, using gauges.
• Threads fabric or rubber sheeting around and between rollers, through coating reservoirs or water coolant tanks, and onto pickup reel core or takeoff conveyor.
• Adjusts knives that trim selvage or cut material to specified width by moving knives along bar and turning setscrews, or replaces numbered rack (set) of knives, using wrenches.
• Adjusts weights on arms of holders so knives will press against rolls and cut through thickness of material processed.
• Observes calendered material for defects, such as bubbles, lumps, streaks, and pitting, and marks defects.
• May direct other workers who feed stock, change takeup reels, take off and inspect stamped parts, and place them in books, boards, and frames.
• May be designated according to material calendered as calender operator, fabric; calender operator, gum stock.